皮皮学，免费搜题
登录
搜题
【简答题】
在等差数列{a n }中， （1）已知a 15 =33,a 45 =153,求a 61 ; (2)已知a 6 =10,S 5 =5，求a 8 和S 8 ； （3）已知前3为12，前3项积为48，且d＞0,求a 1 .
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】怎样将 2D 草图拉伸、旋转、扫掠、蒙皮成为 3D 几何模型?
【简答题】To put it simply, China is extremely big.
【简答题】A．Average. B．Extremely had. C．Extremely good. D．There isn't enough information given.
【简答题】A study on the heat insulation coating material for the heat exchange equipment in chemical industry.
【单选题】The boy was extremely embarrassed by his actions.
A.
extremely
B.
embarrassed
C.
his actions
【简答题】Heat-Exchange equipment in chemical industry.
【简答题】Heat Exchange的中文意思是（）。
【简答题】A．precisely B．extraordinarily C．exceedingly D．extremely
【单选题】The direct evaporative cooling process is an adiabatic exchange of heat.
A.
间接
B.
直接
C.
困难
D.
控制
相关题目：