C-13-Q117mediumsingle_mcqThe number of terms in 12+24+48+⋯+76812 + 24 + 48 + \cdots + 76812+24+48+⋯+768 is —a777b666c888d99ব্যাখ্যাThe last term is 768=12⋅2n−1768=12\cdot 2^{n-1}768=12⋅2n−1, so 2n−1=64=262^{n-1}=64=2^{6}2n−, giving and hence terms.