
Grade 10General Physics
How many terms are there in the expansion of (4x+7y)^10+(4x-7y)^10?
How many terms are there in the expansion of (4x+7y)^10+(4x-7y)^10?

In viewing through a magnifying glass, one usually positions one's eyes very close to the lens. Does angular magnification change if the eye is moved back?
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