a) 1/2a ²+1 . x = 2 b) 4/7. x- x = -9/14 làm nhanh giúp mik nha 02/09/2021 Bởi Vivian a) 1/2a ²+1 . x = 2 b) 4/7. x- x = -9/14 làm nhanh giúp mik nha
Đáp án: a, ` 1/2a^2 + 1. x = 2 ` ` x = 2 – 1/2a^2 ` ` x = (4 – a^2 )/2 ` b, ` 4/7 x – x = -9/14 ` ` = x( 4/7 – 1 ) = -9/14 ` ` = x. ( -3/7 ) = -9/14 ` ` x = -9/14 * (-3/7 ) ` ` x = -3/14 ` @quynhchik852 Bình luận
a, $\frac{1}{2}$ . $a^{2}$ + 1.x = 2 ⇒ $\frac{a^{2}}{2}$ + x = 2 ⇒ x = 2 – $\frac{a^{2}}{2}$ ⇒ x = $\frac{4 – a^{2}}{2}$ Vậy x = $\frac{4 – a^{2}}{2}$ b, $\frac{4}{7}$ . x – x =$\frac{-9}{14}$ x($\frac{4}{7}$ – 1) = $\frac{-9}{14}$ x . $\frac{-3}{7}$ = $\frac{-9}{14}$ x = $\frac{3}{2}$ Vậy x = $\frac{3}{2}$ Bình luận
Đáp án:
a, ` 1/2a^2 + 1. x = 2 `
` x = 2 – 1/2a^2 `
` x = (4 – a^2 )/2 `
b, ` 4/7 x – x = -9/14 `
` = x( 4/7 – 1 ) = -9/14 `
` = x. ( -3/7 ) = -9/14 `
` x = -9/14 * (-3/7 ) `
` x = -3/14 `
@quynhchik852
a, $\frac{1}{2}$ . $a^{2}$ + 1.x = 2
⇒ $\frac{a^{2}}{2}$ + x = 2
⇒ x = 2 – $\frac{a^{2}}{2}$
⇒ x = $\frac{4 – a^{2}}{2}$
Vậy x = $\frac{4 – a^{2}}{2}$
b, $\frac{4}{7}$ . x – x =$\frac{-9}{14}$
x($\frac{4}{7}$ – 1) = $\frac{-9}{14}$
x . $\frac{-3}{7}$ = $\frac{-9}{14}$
x = $\frac{3}{2}$
Vậy x = $\frac{3}{2}$