单项选择题
函数y=x3+2sinx ()
A.是奇函数B.既不是奇函数也不是偶函数C.既是奇函数又是偶函数D.是偶函数
单项选择题 Why didn't the writer get the burglar alarm system switched on?()
单项选择题 What did the Economic Mobility Project find in its research?()
未知题型 已知公比为q的等比数列{an)中,a2=4,a5=-32.(I)求q;(11)求{an}的前6项和S6.