Toán Tìm x 1/4*2/6*3/8*4/10*5/12*…*30/62*31/64= 2^x 13/09/2021 By Eden Tìm x 1/4*2/6*3/8*4/10*5/12*…*30/62*31/64= 2^x
Đáp án: Giải thích các bước giải: 1/4 * 2/6 * 3/8 * 4/10 * 5/12 * … * 30/62 * 31/64 = 4^x => 1/2.2 * 3/2.3 * 3/2.4 * 4/2.5 * 5/2.6 * … * 31/2.32 = 4^x => 1/2^31* 1/32 = 4^x => 1/2^31 * 1/2^5 = 4^x => 1/2^36 = 4^x = 2^(2x) => 2^(-36) = 2^(2x) => 2x = -36 suy ra x = -18. Trả lời
1/4 * 2/6 * 3/8 * 4/10 * 5/12 * … * 30/62 * 31/64 = 2^x –> 1/2.2 * 3/2.3 * 3/2.4 * 4/2.5 * 5/2.6 * … * 31/2.32 = 2^x –> 1/2^31* 1/32 = 2^x –> 1/2^31 * 1/2^5 = 2^x –> 1/2^36 = 2^x –> 2^(-36) = 2^x –> x = -36 Trả lời
Đáp án:
Giải thích các bước giải:
1/4 * 2/6 * 3/8 * 4/10 * 5/12 * … * 30/62 * 31/64 = 4^x
=> 1/2.2 * 3/2.3 * 3/2.4 * 4/2.5 * 5/2.6 * … * 31/2.32 = 4^x
=> 1/2^31* 1/32 = 4^x
=> 1/2^31 * 1/2^5 = 4^x
=> 1/2^36 = 4^x = 2^(2x)
=> 2^(-36) = 2^(2x)
=> 2x = -36 suy ra x = -18.
1/4 * 2/6 * 3/8 * 4/10 * 5/12 * … * 30/62 * 31/64 = 2^x
–> 1/2.2 * 3/2.3 * 3/2.4 * 4/2.5 * 5/2.6 * … * 31/2.32 = 2^x
–> 1/2^31* 1/32 = 2^x
–> 1/2^31 * 1/2^5 = 2^x
–> 1/2^36 = 2^x
–> 2^(-36) = 2^x
–> x = -36