let U.V,W be finite dimensional vector spaces over F , and L:U-V, M:V-W be linear mappingshowa) r(ML) <= r(M)b) n(ML) >= n(L)
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let L:U-V be a inear mapping s.t U,V are finite dimensional ofdimension m,n respectivelya) show if m > n , then L is not injective .b) show if m < n , then L is not surjective .
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