Simplify √32 + √18 giving your answer in the form of a√2.
√32 + √18
= 4√2 + 3√2
= 7√2
KS
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1. (a) Find the sum of all the integers between 1 and 1000 which are divisible by 7. (b) Hence, or otherwise, evaluate the sum of (7r+2) from r=1 to r=142