जब a=0 और b=-1 है तो दिए हुए व्यंजकों क...

जब `a=0` और `b=-1` है तो दिए हुए व्यंजकों के मान ज्ञात कीजिए।
(i) `2a+2b` (ii) `2a^(2)+b^(2)+1` (iii) `2a^(2)b+2ab^(2)+ab` (iv) `a^(2)+ab+2`

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